This simple SCR trigger was found in a 1965 General Electric SCR manual. The circuit makes use of a diac, and the transistor supports an equivalent.
This powerful FM transmitter with FET can reach more than 1 km in favorable conditions. L1...
Found in Popular Electronics from the 90s, this circuit generates two tones that are selected by a...
Found in a 73 magazine for radio amateurs of the 90s, this circuit provides a 2 kV voltage with 7.5...